Earlier quoted context omitted.
There's a weird fundamental flaw in social groups which is this: 1. Trusting trustworthy people increases efficiency. The less checking and verification you have to do, the less redundant work there is and the more easily things go. 2. As the number of trustworthy people in a group increases, the value of choosing to trust a random person increases. The odds get greater that they will be trustworthy, letting you reap…
You can drive the number closer to 100% by making sure to have strong revenge on malice and a high probability that the revenge hits the right person. In practice that means trust people once you have confirmed identity and if you’re in a trustworthy legislation.
This is also fundamentally hard, though. As the ratio of trustworthy people increases, the odds of false positives necessarily increase too.